<section class="channel-h5">
    <div class="channel-h5__header">
        <p class="channel-h5__title">
            精选专题<i>热</i>
        </p>
    </div>
    <ul class="banner-h5__list">
        <li v-for="item in topic">
            <div class="banner-h5__cover">
                <img alt="{{item.ad_name}}" v-bind:src="item.ad_pic_url">
            </div>
        </li>
    </ul>
    <a href="/free" class="channel-group__footer">更多精彩专题&gt;&gt;</a>
</section>